The U.S. Army Corps of Engineers (USACE) Baltimore District is considering a re-procurement of an Indefinite-Delivery Indefinite-Quantity (IDIQ) for Chelated Copper Algaecide (Bulk Liquid) at the Washington Aqueduct that will meet the requirements of ANSI/AWWA Standard B602 and shall be certified to meet NSF/ANSI Standard 60. This IDIQ would have a five-year ordering period. The NAICS code for this procurement is 325180 - Other Basic Inorganic Chemical Manufacturing which has a small business size standard of 1,000 employees.